Wristwatch



FIG. 1 is a front perspective view of a wristwatch showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a side view thereof. 

CLAIM The ornamental design for a wristwatch, as shown. 